Peter’s Second Gospel Sermon

Most people who know anything at all about the Christian faith realize that Peter preached the first gospel sermon ever preached on the Day of Pentecost as recorded in Acts 2.  The second recorded sermon in the Christian dispensation of time is again a sermon preached by Peter as found in the next chapter in Acts, chapter 3.  That there was preaching being done between Peter’s first sermon and his second there is no doubt for the Bible says “the Lord was adding to their number day by day those who were being saved” (Acts 2:47 NAS) and this was after Pentecost but before the events recorded in Acts 3.
Of those sermons, of which we know nothing, we can only say with certainty that the truth was taught and what was taught was the same as that taught by Peter in Acts 2 by inspiration of the Holy Spirit.  For it to be otherwise would be to say two or more different gospels were preached which we are sure was not the case.  Peter did not preach one gospel one day and another gospel another day.  He did not have a different gospel for everyday of the week or month nor did one apostle preach one thing and another apostle preach something else.
In order to not make this article too long I want to zero in on only one issue